import {
  login,
  logout,
  getInfo
} from '@/api/user'
import {
  getToken,
  setToken,
  removeToken
} from '@/utils/auth'
import {
  resetRouter
} from '@/router'

const getDefaultState = () => {
  return {
    token: getToken(),
    name: '',
    avatar: ''
  }
}

const state = getDefaultState()

const mutations = {
  RESET_STATE: (state) => {
    Object.assign(state, getDefaultState())
  },
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  SET_NAME: (state, name) => {
    state.name = name
  },
  SET_AVATAR: (state, avatar) => {
    state.avatar = avatar
  }
}

const actions = {
  // user login
  // 实现一个action用来登录
  async login({ commit }, from) {
    // context类似于$store
    // payload是触发action时传递的参数
    const ret = await login({
      mobile: form.username,
      password: form.password
    })
    if (ret.data.code === 10000) {
      // 登陆成功

      return true
    } else {
      // 登陆失败
      return false
    }
  },
  // login({
  //   commit
  // }, userInfo) {
  //   const {
  //     username,
  //     password
  //   } = userInfo
  //   return new Promise((resolve, reject) => {
  //     login({
  //       username: username.trim(),
  //       password: password
  //       // response 是后端返回的结果
  //     }).then(response => {
  //       const {
  //         data
  //       } = response
  //       // 把后端返回的token保存到state里面
  //       commit('SET_TOKEN', data.token)
  //       // 把token保存到的本地缓存
  //       setToken(data.token)
  //       resolve()
  //     }).catch(error => {
  //       reject(error)
  //     })
  //   })
  // },

  // get user info
  getInfo({
    commit,
    state
  }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token).then(response => {
        const {
          data
        } = response

        if (!data) {
          return reject('Verification failed, please Login again.')
        }

        const {
          name,
          avatar
        } = data

        commit('SET_NAME', name)
        commit('SET_AVATAR', avatar)
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

  // user logout
  logout({
    commit,
    state
  }) {
    return new Promise((resolve, reject) => {
      logout(state.token).then(() => {
        removeToken() // must remove  token  first
        resetRouter()
        commit('RESET_STATE')
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // remove token
  resetToken({
    commit
  }) {
    return new Promise(resolve => {
      removeToken() // must remove  token  first
      commit('RESET_STATE')
      resolve()
    })
  }
}

export default {
  // 命名空间，把模块变成局部的
  namespaced: true,
  // state：state,
  state,
  mutations,
  actions
}
